EM6323/24- Watchdog

Low voltage (1.3V-4.6V) reset circuit with manual reset and watchdog in SOT23-5 - Ultra-Low Power

General Description

The EM6323 and EM6324 are low power, high precision reset ICs featuring a manual reset and a watchdog inputs. They have different threshold voltages and several timeout reset periods (tPOR) and watchdog timeout periods (tWD) for maximum flexibility in the application. EM6323 has a manual reset (/MR with internal pull-up) and a watchdog input pins. EM6324 has only a watchdog input pin (WDI). The watchdog function can be disabled by driving WDI with a three-state driver or by leaving WDI unconnected. This is useful when the MCU is in sleep mode. Small 5-pin SOT23 package as well as ultra-low supply current of 3.8/m/A make the EM6323 and the EM6324 an ideal choice for portable and battery-operated devices.

Solutions

  • Workstations
  • Point of sales (POS)
  • Personal computers
  • Routers, hubs and switches
  • Handheld GPS
  • Automotive systems
  • Vending machines and ATM

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Features

  • Ultra-low supply current of 3.8uA (VDD=3.3V)
  • Operating temperature range: -40°C to +125°C
  • ±1.5% reset threshold accuracy
  • 11 reset threshold voltages VTH: 4.63V, 4.4V, 3.08V, 2.93V, 2.63V, 2.2V, 1.8V, 1.66V, 1.57V, 1.38V, 1.31V
  • 200ms reset timeout period (1.6ms, 25ms, 1600ms on request)
  • 1.6s watchdog timeout period (6.2ms, 102ms, 25.6s on request)
  • 3 reset output options: active-low /RESET push-pull, active-low /RESET open-drain, active-high RESET push-pull
  • Detection of microcontroller in sleep mode
  • Small SOT23-5 package
AttachmentSize
EM6323 EM6324 Data Sheet610.41 KB